What I i did is, I edited the config.php file and change there the smtp settings but the problem is, every time i export a new object the smtp settings that I put in the config.php file are overwritten or deleted.

I want to know how to set up the smtp email settings properly. Please help.

The "config.php" file holds the default configuration, which is overwritten with every export from ImmoTool. To make sure, that your custom configurations are not lost, you can put the mail settings into the "load_config_default" function of the "myconfig.php" file: